Gc. Howard et al., IDENTIFICATION OF RESIDUES IN ALPHA-MACROGLOBULINS INVOLVED IN ACTIVATION OF THE ALPHA(2)-MACROGLOBULIN SIGNALING RECEPTOR, Biochimica et biophysica acta. Protein structure and molecular enzymology, 1297(2), 1996, pp. 111-114
Site-directed mutagenesis of residues in the receptor binding fragment
of rat alpha(1)-macroglobulin identify residues 1377 and 1378 (human
numbering) as crucial for interaction with the alpha(2)M signaling rec
eptor on murine macrophages. Secondary structure prediction and signal
ing studies with the mutant proteins suggest the alpha(1)M signaling r
eceptor binding site involves part of a loop-helix-loop motif comprise
d of residues 1372-1378.